Trussed structure.



UNITED STATE PATENT OFFTQE.

PHILIP B. HARRISON, OF CHICAGO, ILLINOIS, ASSIGNOR TO CHICAGO RAILWAY EQUIPMENT COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

TRUSSED STRUCTURE.

specification of Letters Patent.

Application filed July 12, 1909.

Patented June *7, 1910. Serial No. 507,180.

To all whom it may concern:

Be it known that I, PHILIP B. HARRISON, a citizen of the United States, residing at Chicago, Illinois, have invented a certain new and useful Improvement in Trussed Structures, of which the following is a full, clear, and exact description, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, forming part of this specification, in which- Figure 1 is an elevation of a trussed bolster of my improved construction, one end thereof being shown in vertical section. Fig. 2 is a plan view of one end of the bolster. Fig. 3 is a cross section taken on the line 3-3 of Fig. 2. Fig. 4 is a vertical section taken through the end of a modified form of the bolster. Fig. 5 is a cross section taken on the line 5-5 of Fig. 4. Fig. 6 is a vertical section taken through one end of a further modified form of the bolster. Fig. 7 is a cross section taken on the line 77 of Fig. 6. Fig. 8 is a cross section taken through the end of a further modified form of the bolster, the body of which is built up of angle bars. Fig. 9 is a elevation of one end of a further modified form of the bolster. Fig. 10 is a vertical section taken through the end of a modified form of the bolster shown in Fig. 9.

My invention relates to a trussed structure designed for use as a truck bolster, although with slight modifications my improved construction can be used for a body bolster, or a brake beam, etc, the object of my invention being to construct a simple, inexpensive trussed structure the body of which is made up of ordinary structural iron or steel shapes, such as channels, angle bars, straps and the like, which construction enables me to produce a very strong, rigid structure with comparatively little expense, inasmuch as the time and labor involved in assembling the bolster is comparatively small.

A further object of my invention is to so construct and unite the ends of the compression and tension members of the structure that the greatest rigidity is obtained, and the stress and strain imparted to the compression and tension members while in use is evenly distributed throughout the entire structure.

To the above purposes, my invention consists in certain novel features of construction and arrangement of parts which will hereinafter be more fully described and claimed.

Referring by numerals to the preferred form of my improved bolster illustrated in Figs. 1, 2 and 3, 1 designates the compression member which is in the form of a channel, the flanges of which project downwardly, and the web of said channel is indented adjacent its ends, as designated by 2, to form a plurality of transversely disposed shoulders on the under side of said web. 3 designates the tension member of the bolster, the same being in the form of a channel slightly narrower in width than the channel 1, and the flanges of said channel'3 project upwardly. The web of this channel is indented or upset adjacent its'ends, as designated by 41, to form a plurality of transversely disposed shoulders on the top side of said web. Interposed between the ends of the channels 1 and 3 are metallic thrust or filler blocks 5 which completely fill the approximately rectangular spaces between the ends of the com pression and tension members. Formed in the top and bottom faces of said blocks are transversely disposed recesses 6 which receive the bent or indented portions of the channels 1 and 3, and the transverse shoulders on said indented portions bear against the shoulders at the sides of the recess 3. This construction positively locks the ends of the compression and tension members against longitudinal movement relative to one another, and also provides means for equalizing and distributing the stress and strain of the compression and tension members while the bolster is in use. The channels 1 and 2 are united and locked to the blocks 5 by means of bolts or rivets 7 which pass through suitable apertures formed through the webs of the channels and said blocks. A pair of lugs 8 is formed integral with and projects outwardly from the side faces of the blocks 5, the flanges of the channels l and 3 being cut away, as designated by 9, to accommodate these lugs, and said lugs perform the function of column guides when the bolster is in use. Interposed between the central portions of the compression and tension members is a strut 10, and fixed on top of the center of the compression member is the lower plate 11 of a center bearing. Fixed in any suitable manner on top of the compression member at points adjacent the ends thereof are suitable side bearings 12.

While I prefer to form the compression and tension members of channels, it may be found advantageous and desirable in some instances to form each of said members of a pair of angle bars, as shown in Fig. 8, or the tension member 3 may be formed of a single plate or flat bar.

In Figs. 4 and 5, I have illustrated a modified .construction wherein the compres sion member is formed of a channel indented adjacent its ends, as hereinbefore described. The tension member is composed of a plate 13, the ends of which are indented or bent so as to fit snugly against the under side of the indented ends of the channel forming the compression member, and fitting against the under sides of the ends of this plate 13 and positioned between the depending flanges 011 the ends of the compression member is an end casting 14 which is provided on its top face with transverse shoulders 15, which abut the shoulders formed on the under side of the plate 18. This end casting 14 is provided on its outer end with an upwardly projecting lug 16 which bears against the extreme outer ends of the compression and tension members. Formed integral with the sides of said end casting are outwardly projecting lugs 17 which extend through suitably formed notches 18 in the flanges of the compression member, and if desired, these lugs can be so located as to perform the function of column guides. Bolts or rivets 19. are seated in coinciding apertures formed through the end portions of the compression and tension members and through the end castings 14, thus firmly uniting these parts.

In Figs. 6 and 7, I have illustrated a form of bolster wherein the compression and ten sion members are both formed of channels with the flanges projecting downward, and where such construction is made use of, the channel forming the tension member is somewhat narrower than the channel forming the compression member, and the ends of both channels are indented and fitted to one another in such a manner as that the transverse shoulders formed by indenting the webs of the channels fit snugly against one another, and a filler block 20 is positioned beneath each end of the tension member and is secured thereto and to the compression member by means of bolts or rivets 21. In this construction, lugs 22 are formed integral with the sides of said filler block, and said lugs project through coinciding notches 23 formed in the flanges of the two channels.

In Figs. 9 and 10, I have shown a bolster comprising a channel compression member 24 and a fiat plate tension member 25, the ends of the latter being bent to form hooks 26, which engage around the ends of thrust blocks 27, which latter are located beneath the ends of the channel 24 and firmly fixed thereto by means of bolts or rivets 28, which pass through coinciding apertures formed through the ends of the channel 24, plate 25 and block 27. In this construction, lugs 28 are formed integral with the sides of the thrust block 27, which lugs are seated in suitably formed notches in the flanges depending from the web of the channel 24.

A bolster of my improved construction is comparatively simple, is easily assembled, provides a very strong and rigid construction, is so formed as to equalize the stress and strain throughout the entire structure, and as the main portions of the bolster are formed of ordinary commercial shapes, said bolster can be manufactured at a comparatively low cost.

It will be readily understood that minor changes can be made in the construction and arrangement of the bolster herein shown and described without departingfrom the spirit of my invention.

I claim:

1. In a trussed structure, a compression member, a tension member, there being shoulders formed on said members adjacent their ends, and thrust blocks arranged at the ends of said members, which thrust blocks are provided with shoulders which engage the shoulders on said members.

2. In a trussed structure, a compression member, a tension member, there being shoulders formed on said members adjacent their ends, thrust blocks arranged at the ends of said members, which thrust blocks are provided with shoulders which engage the shoulders on said members, and fastening devices passing through the ends of said members and through the thrust blocks.

8. The herein-described trussed structure, having a compression member and tension member formed of commercially rolled flanged shapes, and thrust blocks fixed to the ends of said members.

4. The herein-described trussed structure, having a compression member and tension member formed of commercially rolled metal shapes, thrust blocks fixed to the ends of said members, and there being abutting shoulders formed on said thrust blocks and on said compression and tension members near their ends.

5. The herein-described trussed structure, having a compression member and a tension member formed of commercially rolled flanged shapes, thrust blocks fixed to the ends of the members, and lugs integral with and projecting outwardly from the sides of said thrust blocks.

6. The herein described truss structure, having a compression member and a tension member formed of commercially rolled metal shapes, thrust blocks fixed to the ends of the members, lugs integral with and projecting outwardly from the sides of said thrust blocks, and there being notches formed in the side portions of the compression and tension members through which said lugs project.

7. In a trussed structure, a compression member, a tension member, formed of commercially rolled metal shapes, the end portions of which are indented or bent to form shoulders, and thrust blocks fixed to the ends of the compression and tension members and provided with recesses which receive the indented or bent portions of the compression and tension members.

8. In a trussed structure, a compression member, a tension member, thrust blocks fixed to the ends of said members, lugs integral with the sides of the thrust blocks, which lugs form column guides, and there being notches formed in the sides of the compression and tension members to accommodate said lugs.

9. In a trussed structure, a compression member, there being shoulders formed on said member adjacent its ends, a tension member, and thrust blocks arranged within the ends of said members, which thrust blocks are provided with shoulders which engage the shoulders on the compression member.

10. In a trussed structure, a compression member, there being shoulders formed on said member adjacent its ends, a tension member, thrust blocks arranged within the ends of said members, which thrust blocks are provided with shoulders which engage the shoulders on the compression member, and outwardly projecting lugs on the sides of the thrust blocks.

11. In a trussed structure, a compression member, a tension member, there being shoulders formed on said tension member adjacent its ends, and thrust blocks arranged within the ends of said members, which thrust blocks are provided with shoulders which engage the shoulders on the tension member.

12. In a trussed structure, a compression member, a tension member, there being shoulders formed on said tension member adjacent its ends, thrust blocks arranged within the ends of said members, which thrust blocks are provided with shoulders which engage the shoulders on the tension member, and outwardly projecting lugs on the sides of the thrust blocks.

13. In a trussed structure, a compression member, a tension member, there being abutting shoulders formed on said members adjacent their ends, blocks fixed to and within the ends of said members, and outwardly projecting lugs on the sides of said blocks.

14;. A trussed structure, whose compression and tension members are oppositely indented to form interlocks at the ends of the structure and a thrust block interposed between said interlocks.

15. A trussed structure,whose compression and tension members are provided-with a plurality of indentations at their'ends to form interlocks and a thrust block"inter posed between said interlocks.

16. A trussed structure, whose compression and tension members are provided with oppositely disposed interlocks at their ends, and thrust blocks with which said interlocks cooperate.

17. A trussed structure comprising a flanged compression member and a tension member, the web of said compression member being indented to form an interlock, and a thrust block interposed between said members and interlocking with said compression member.

In testimony whereof I hereunto afliX my signature in the presence of two witnesses, this 28 day of J une 1909.

PHILIP B. HARRISON.

Vitnesses:

EDWARD T. WALKER, JOSEPH WV. WEINLAND. 

